British Airways Airbus A320-200, registration G-EUYM performing flight BA-633 from Athens (Greece) to London Heathrow,EN (UK), was on final approach to Heathrow's runway 27R about 4nm before touchdown when the captain donned his oxygen mask and declared Mayday, Mayday advising he was going to continue the approach. The aircraft touched down safely on runway 27R about 2 minutes later.
On Jan 4th 2020 The Aviation Herald received information that on final approach the first officer passed out, the captain smelled the odour of old socks, immediately donned his oxygen mask, declared emergency and continued for a safe landing. Passengers and cabin crew remained unaware until after landing.
On Jan 5th 2020 The Aviation Herald received more details: On approach to Heathrow the captain noticed the odour of dirty old socks, the first officer, pilot flying, did not smell anything. The captain believes the odour is dissipating. Then the first officer started breathing heavily, slumps forward and no longer responds to questions by the captain. The captain therefore takes control, dons his oxygen mask, declares Mayday, configures the aircraft for landing and lands safely. After landing, in care by medical staff, the first officer recovers.
The occurrence aircraft is still on the ground in Heathrow about 60 hours after landing.
linky:
Accident: British Airways A320 at London on Jan 2nd 2020, fumes take out first officer
ETA apparently the FO didn’t pass out